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利用HSC-Chemistry软件平台对以气-液-固三相为基础的水淬钢渣碳酸化固定二氧化碳进行了热力学分析,结果表明,温度700 K以下钢渣主要含钙相在水溶液中能够自发与CO2反应,碳酸化固定CO2是可行的;并通过实验研究了反应时间、钢渣粒径、CO2流量及液固比等主要参数对水淬钢渣碳酸化固定CO2的影响。结果显示,在初期阶段反应迅速,固碳率在3 h达到27.9%,即固定二氧化碳的能力约为279 kg/t(钢渣),随后逐渐趋于平衡。粒度越细对固碳过程越有利,液固比及CO2流量影响不明显;XRD及SEM结果也验证了水淬钢渣固定CO2是可行的。
The thermodynamic analysis of carbonation and carbon dioxide fixation of water quenched steel slag based on gas-liquid-solid three-phase was carried out by HSC-Chemistry software platform. The results show that the main calcium-containing steel slag with temperature below 700 K can spontaneously react with CO2 in aqueous solution , Carbon dioxide fixation CO2 is feasible; and through the experimental study of the reaction time, slag size, CO2 flow and liquid-solid ratio and other key parameters on the carbonation of CO2-fixed CO2-fixed. The results showed that the reaction was rapid at the initial stage and the carbon sequestration rate reached 27.9% at 3 h, that is, the capacity to fix carbon dioxide was about 279 kg / t (steel slag) and then gradually became more balanced. The finer the grain size is, the better the carbon sequestration process is, and the liquid-solid ratio and CO2 flow rate are insignificant. The results of XRD and SEM also verify that it is feasible to fix CO2 with water quenched steel slag.